DCP Productions Motif XS, Owner'S Manual

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squawky, distorted sound and robotic bass patterns were just what
their new music called for. And two, a little synth company called
Novation created a rackmount synth module version of the TB-303,
called the Bass Station. It was the Bass Station that really took off,
and the TB-303 sound wedged itself into tons of electro, dance,
house, and industrial tracks. Where it remains to this day.
Roland TB-303 Bassline (shown about one-third actual size).
Various Synth Effects - F9 thru F16
F9 – Oscillator Mod 1
Type of sound achieved by modulating filter self-oscillation with
another source. On the Minimoog, ARP, and later the Prophet and
Oberheim synths, the filter itself could be driven far enough into
resonance that it "whistled" or self-oscillated on its own. One could
then play discrete pitches on the keyboard using the filter alone -
although the pitches weren't exact incremental steps like a scale, nor
did they behave predictably interval-wise. But that was where the fun
was. Since the third oscillator on the Minimoog could be switched to
sub or low-frequency oscillation, it could modulate (affect) the self-
oscillating filter. In essence, you were using the predictable waveform